Datasheet

ADuC7128/ADuC7129
Rev. 0 | Page 4 of 92
SPECIFICATIONS
AV
DD
= IOV
DD
= 3.0 V to 3.6 V, V
REF
= 2.5 V internal reference, f
CORE
= 41.78 MHz. All specifications T
A
= T
MAX
to T
MIN
, unless
otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
ADC CHANNEL SPECIFICATIONS Eight acquisition clocks and fADC/2
ADC Power-Up Time 5 s
DC Accuracy
1, 2
Resolution 12 Bits
Integral Nonlinearity
3
±0.7 ±2.0 LSB 2.5 V internal reference 85°C to 125°C only
±0.7 ±1.5 LSB 2.5 V internal reference −40°C to +85°C
±2.0 LSB 1.0 V external reference
Differential Nonlinearity
3
±0.5 +1/−0.9 LSB 2.5 V internal reference
±0.6 LSB 1.0 V external reference
DC Code Distribution 1 LSB ADC input is a dc voltage
ENDPOINT ERRORS
4
Offset Error ±5 LSB
Offset Error Match ±1 LSB
Gain Error ±5 LSB
Gain Error Match ±1 LSB
DYNAMIC PERFORMANCE F
IN
= 10 kHz sine wave, f
SAMPLE
= 1 MSPS
Signal-to-Noise Ratio (SNR) 69 dB
Total Harmonic Distortion (THD) −78 dB
Peak Harmonic or Spurious Noise −75 dB
Channel-to-Channel Crosstalk −80 dB
Crosstalk Between Channel 12 and
Channel 13
−60 dB
ANALOG INPUT
Input Voltage Ranges
Differential Mode
5
V
CM
± V
REF
/2 V
Single-Ended Mode 0 to V
REF
V
Leakage Current ±15 µA 85°C to 125°C only
±1 ±3 µA −40°C to +85°C
Input Capacitance 20 pF During ADC acquisition
ON-CHIP VOLTAGE REFERENCE 0.47 µF from V
REF
to AGND
Output Voltage 2.5 V
Accuracy ±2.5 mV Measured at T
A
= 25°C
Reference Drop When DAC Enabled 9 mV Reference drop when DAC enabled
Reference Temperature Coefficient ±40 ppm/°C
Power Supply Rejection Ratio 80 dB
Output Impedance 40 Ω
Internal V
REF
Power-On Time 1 ms
EXTERNAL REFERENCE INPUT
6
Input Voltage Range 0.625 AV
DD
V
Input Impedance 38 kΩ
DAC CHANNEL SPECIFICATIONS
VDAC Output R
L
= 5 kΩ, C
L
= 100 pF
Voltage Swing
(0.33 × V
REF
±
0.2 × V
REF
) ×
1.33
V
REF
is the internal 2.5 V reference
I/V Output Resistance 7 Ω V mode selected
Low-Pass Filter 3 dB Point 1 MHz 2-pole at 1.5 MHz and 2 MHz
Resolution 10 Bits